Amplification display device
By designing the longitudinal axis defocusing design of the amplified display device, combined with the use of a hyperbolic mirror, the problem of myopia growth in children is solved, and the dual effects of double myopia prevention and control and line of sight focus are achieved, reducing the chances of children using their eyes at close range.
Patent Information
- Application Number
- CN202310680996.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-09
- Publication Date
- 2024-12-10
AI Technical Summary
The proportion of myopia in children increases, and long-term eye use is one of the main reasons. The existing technologies such as peripheral myopia defocused glasses and corneal resizing lenses can only unilaterally postpone the growth of myopia and fail to effectively solve the problem of dual prevention and control.
Design an enlarged display device, adopting a longitudinal axis defocusing design, so that half of the sight is focused on the retina and the other half is focused in front of the retina. The longitudinal virtual image imaging distance is achieved through the magnification mirror group and the load-load bracket to achieve a longitudinal virtual image imaging distance far from the transverse virtual image imaging distance, combined with double The use of concave mirrors and convex mirrors creates a significant longitudinal axis defocusing effect.
The dual myopia prevention and control effect is achieved, reducing the chance of eye use for a long time, and delaying eye axis growth through the longitudinal axis defocusing design, significantly improving the focus effect of line of vision imaging.
Smart Images
Figure CN119105177A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a magnifying display device, and more precisely, to a magnifying display device capable of correcting, controlling or delaying the occurrence of myopia. Background Art
[0002] Due to the popularity of electronic products such as mobile phones and tablets, the increasing proportion of children with myopia is a problem faced by many regions. In addition to genetic genes, long-term close-range use of the eyes is also one of the main causes of myopia.
[0003] like Figure 1 As shown, there are many ways to control the growth of myopia, and one of the methods generally considered effective is to wear peripheral defocus glasses. The central curvature of the lens 91 (peripheral myopia defocus lens) of this type of glasses is customized according to the wearer's vision, so that the line of sight in the middle position is focused on the retina (i.e., the focusing area 921) and can be seen clearly. The microstructure of the periphery of the lens has a smaller curvature, so it has a longer focal length, allowing the line of sight to focus in front of the retina (i.e., the peripheral defocus area 922), so the line of sight image 93 is focused earlier. If the defocus image is designed at the periphery of the lens, only the image in the center of the lens will be clear, the wearer's line of sight will be more focused, and the peripheral defocus image will be less likely to interfere with the wearer's life.
[0004] The effect of peripheral myopic defocus on myopia prevention and control comes from experiments on animals (monkeys), which have achieved good results. According to medical research, the retina has a phenomenon of tracking focus. When the line of sight is focused in front of the retina, it will cause the retina to tend to move forward, thereby offsetting the effect of axial length growth, which is the main physiological change that causes permanent myopia.
[0005] Another method is to wear orthokeratology lenses. Orthokeratology lenses can inhibit the growth of myopia based on a similar principle. They are hard contact lenses that are worn at night while sleeping. Their function is to use the shape of the lens to press the central part of the cornea, causing temporary physical deformation of the central part of the cornea. After removing them during the day, you can still have clear vision for one or two days. The reason why they can delay the growth of myopia in addition to providing short-term clear vision is that the orthokeratology lenses only shape the central part of the cornea, while the periphery of the cornea still maintains its original myopic state, allowing the peripheral vision to focus in front of the retina.
[0006] Corneal reshaping lenses have the effect of delaying the growth of myopia, which also indirectly proves that peripheral myopic defocus does have the effect of delaying the growth of myopia. Summary of the invention
[0007] The purpose of the present invention is to provide a magnifying display device, which can not only zoom in on close objects and reduce the chance of long-term close-up use of the eyes, but also has a longitudinal defocusing effect when using the device to delay the growth of the eye axis and achieve a dual myopia prevention and control effect.
[0008] The magnifying display device of the present invention is not a display device close to the eyeball, but instead adopts longitudinal axis defocusing, so that half of the line of sight falls on the retina and the other half is focused in front of the retina, so as to partially achieve the effect of longitudinal axis defocusing, so that the longitudinal virtual image imaging distance of the magnifying display device is significantly farther than the lateral virtual image imaging distance. When the eyeball focuses on the lateral virtual image, the line of sight imaging will be focused on the retina, and when the eyeball focuses on the longitudinal virtual image, the longitudinal line of sight imaging will be focused in front of the retina.
[0009] According to the above-mentioned purpose, the present invention provides a magnifying display device, comprising a magnifying reflector group installed on a load-bearing bracket, the magnifying reflector group comprising a reflective sheet for receiving and reflecting a projected image, and a magnifying sheet for receiving and magnifying the reflected image of the reflective sheet, wherein the magnifying sheet is a hyperbolic concave mirror or the reflective sheet is a hyperbolic convex mirror, constructing a longitudinal axis defocusing so that the longitudinal virtual image imaging distance of the reflected image is farther than the lateral virtual image imaging distance, so that the image projected by the reflected image on a longitudinal imaging area of a line of sight of the eyeball is a defocused image, and the image projected by the reflected image on a lateral imaging area of a line of sight of the eyeball is a focused image.
[0010] Wherein, let the horizontal axis virtual image distance of the projected image after being reflected by the reflective sheet and the magnifying sheet be VIDh, the vertical axis virtual image distance of the projected image after being reflected by the reflective sheet and the magnifying sheet be VIDv, and the severity of the astigmatism between the longitudinal and lateral directions of the projected image be α, then
[0011]
[0012] The included angle between the reflective sheet and the amplifying sheet is between 24 degrees and 32 degrees.
[0013] The height ratio of the amplifying sheet to the reflecting sheet is between 1:1.2 and 1:1.5.
[0014] The magnifying plate is a hyperbolic concave mirror, the longitudinal axis curvature of the magnifying plate is greater than the transverse axis curvature, and the reflecting plate is a plane mirror or a convex mirror.
[0015] The reflecting plate is a hyperbolic convex mirror, the curvature of the longitudinal axis of the reflecting plate is smaller than the curvature of the transverse axis, and the magnifying plate is a concave mirror.
[0016] The magnifying reflector assembly further comprises a flip frame, one end of which is connected to the upper edge of the reflective sheet, and the other end of which is connected to the lower edge of the magnifying sheet.
[0017] The load-bearing bracket includes an arm group and a fixing seat, one end of the arm group is connected to the magnifying reflector group, and the other end is connected to the fixing seat.
[0018] The arm assembly includes a first arm, a second arm, a first rotating shaft and a second rotating shaft. One end of the first arm is connected to the fixing seat and the other end is connected to the first rotating shaft. One end of the second arm is connected to the second rotating shaft and the other end is connected to the first rotating shaft.
[0019] Wherein, a third rotating shaft is further provided between the supporting arm assembly and the fixing seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of a peripheral defocus control lens.
[0021] Figure 2 1 is a schematic diagram of the structure of an embodiment of an enlarged display device.
[0022] Figure 3a , Figure 3b It is a schematic diagram of using the enlarged display device.
[0023] Figure 4 It is a schematic diagram of the optical path of the magnified display device.
[0024] Figure 5 It is a schematic diagram of the setting angles of the magnifying sheet and the reflecting sheet.
[0025] Explanation of the reference numerals: 91-lens; 921-focusing area; 922-peripheral defocusing area; 93-line of sight imaging; 1-magnifying reflector group; 11-reflecting plate; 12-magnifying plate; 13-flip frame; 15-longitudinal axis; 16-transverse axis; 2-load-bearing bracket; 21-arm group; 211-first arm; 212-second arm; 213-first rotation axis; 214-second rotation axis; 215-third rotation axis; 22-fixed seat; 31-line of sight longitudinal imaging area; 311-line of sight imaging; 32-retina; 331-line of sight imaging; 34-vitreous body; f1, f2-focal length; x, y-distance; q1, q2-image distance; a-angle. DETAILED DESCRIPTION
[0026] In order to clearly illustrate the specific implementation, structure and effect of the present invention, an embodiment is provided and illustrated as follows:
[0027] See also Figures 2 to 5 , depicts a magnifying display device, comprising a magnifying reflector set 1 mounted on a load-bearing bracket 2.
[0028] The load-carrying bracket 2 includes an arm assembly 21 and a fixing seat 22, and the arm assembly 21 and the fixing seat 22 are connected via a third rotating shaft 215. One end of the arm assembly 21 is connected to the magnifying reflector assembly 1, and the other end is connected to the fixing seat 22. The arm assembly 21 includes a first arm 211, a second arm 212, a first rotating shaft 213, and a second rotating shaft 214. One end of the first arm 211 is connected to the fixing seat 22, and the other end is connected to the first rotating shaft 213. One end of the second arm 212 is connected to the second rotating shaft 214, and the other end is connected to the first rotating shaft 213. The second rotating shaft 214 is connected to the magnifying reflector assembly 1.
[0029] The magnifying reflector set 1 comprises a reflective sheet 11 and an amplifying sheet 12, which are connected by a flip frame 13, one end of the flip frame 13 is connected to the upper edge of the reflective sheet 11, and the other end is connected to the lower edge of the amplifying sheet 12. The reflective sheet 11 is used to receive and reflect the projected image, and the amplifying sheet 12 is used to receive the reflected image of the reflective sheet 11 and display the amplified reflected image.
[0030] In the embodiment of the present invention, when the reflector 11 is a hyperbolic convex mirror, the longitudinal curvature of the reflector 11 is smaller than the transverse curvature, and the magnifying sheet 12 is a concave mirror; when the magnifying sheet 12 is a hyperbolic concave mirror, the longitudinal curvature of the magnifying sheet 12 is larger than the transverse curvature, and the reflector 11 is a plane mirror or a convex mirror, so that the image of the reflected image projected on a longitudinal imaging area 31 of a line of sight of the eyeball is a defocused image, and the image of the reflected image projected on a transverse imaging area of a line of sight of the eyeball is a focused image. The illustration of the present invention takes the magnifying sheet 12 as an example of a hyperbolic concave mirror, as shown in FIG. Figure 3a and Figure 3b .
[0031] The aforementioned double curvature means that the curvatures of the longitudinal axis 15 and the transverse axis 16 are defined separately. For the user, the reflected image aligned with (or closer to) the transverse axis will be focused on the retina 32. Therefore, the line of sight image 33 of the reflected image in the vitreous body 34 will be half focused on the retina 32 and the other half focused in front of the retina 32. In other words, the part of the magnifying film 12 has the effect of achieving longitudinal defocusing.
[0032] The aforementioned longitudinal defocus means that the virtual image imaging distance of the reflected image on the longitudinal axis 15 is significantly farther than the virtual image imaging distance on the horizontal axis 16. When the eyeball focuses on the virtual image distance on the horizontal axis 16, the line of sight imaging 331 will be focused on the retina 32 (such as Figure 3a As shown in FIG. 1 , the line of sight image 311 of the longitudinal axis 15 is focused in front of the retina 32 at the imaging position of the vitreous body 34 (the line of sight longitudinal imaging area 31). Figure 3b As shown) to form a defocused image.
[0033] The way the human eye adjusts the image formation can be divided into convergence reflex and lens adjustment. The convergence of the two eyes will cause the human eye to produce a single image in the visual impression. The sight lines of the two eyes intersect and form an angle. The smaller the convergence angle of the two eyes when looking at distant objects, the larger the convergence angle of the two eyes when looking at close objects. Lens adjustment is the focusing adjustment of the lenses of the two eyes. When looking at distant objects, the lenses become thinner, and when looking at close objects, the lenses become thicker, so that the sight lines at different distances can be focused on the retina 32. Convergence reflex and lens adjustment are simultaneous and parallel. Usually, the lens will adjust the focal length of the image according to the convergence angle. The two eyes are located at different horizontal positions, so the convergence reflex is only related to the horizontal visual distance, so the horizontal sight imaging will be focused on the retina 32.
[0034] See also Figure 4 If the magnifying sheet 11 is a concave mirror and the reflecting sheet 12 is a convex mirror, the calculation formulas for imaging and zooming distance are as follows:
[0035] The virtual image formula of the enlarged film 11 is compared with the imaging principle of the concave mirror:
[0036] Where f1 is the focal length, q1 is the image distance, and p1 is the object distance.
[0037] The imaging formula of the reflector 12 is compared with the imaging principle of the convex mirror:
[0038] Where f2 is the focal length, q2 is the object distance, and p2 is the image distance.
[0039] Among them, p1=y+q2 and p2=x.
[0040] If the reflector 12 is a plane mirror, f2 is ∞, and the virtual image distance formula is as follows:
[0041]
[0042] The image distance q1 calculated using the lateral curvature of the focal length f2 of the reflective sheet 12 and the focal length f1 of the magnifying sheet 11 is the horizontal axis virtual image distance VIDh. The image distance q1 calculated using the longitudinal curvature of the focal length f2 of the reflective sheet 12 and the focal length f1 of the magnifying sheet 11 is the longitudinal axis virtual image distance VIDv, which is the distance between the longitudinal imaging area 31 of the line of sight and the retina 32.
[0043] The magnified display device's line of sight longitudinal imaging area 31 will focus in front of the retina 32 rather than on the retina 32. If the line of sight longitudinal imaging area 31 is too far away from the retina 32, the image entering the eye will be blurred longitudinally, and horizontal lines will be blurrier when viewed (astigmatism). Therefore, there can only be a limited difference from the horizontal focal length to maintain the visual quality, but the difference needs to be large enough to achieve the effect of longitudinal axis defocusing.
[0044] The severity of astigmatism caused by the focal length difference between the vertical axis and the horizontal axis can generally be measured using the following value α:
[0045]
[0046] Among them, VIDh is the horizontal virtual image distance (meter), VIDv is the vertical virtual image distance (meter), and VIDh and VIDv can be calculated using the calculation formula of the zoom distance.
[0047] In the optical system, as long as α≤0.13, the astigmatism phenomenon is basically not visible, but the longitudinal defocus distance is relatively short (the distance between the line of sight and the retina 32 in the longitudinal direction), and the focus is about 0.07 mm in front of the retina 32. α can satisfy the following formula.
[0048] 0.07≤α≤0.13
[0049] In the embodiment of the present invention, the value of VIDv is greater than VIDh, so the magnification in the longitudinal direction is higher than the magnification in the transverse direction. At this time, the image in the object lens will be stretched, resulting in a distortion of the aspect ratio. The problem of aspect ratio distortion needs to be avoided by adjusting the angle between the magnifying sheet 12 and the reflecting sheet 11. The larger the angle between the magnifying sheet 12 and the reflecting sheet 11, the smaller the aspect ratio of the image in the object lens, and vice versa. Generally, the angle a between the reflecting sheet 11 and the magnifying sheet 12 is about 24 degrees to 32 degrees (see Figure 5 ).
[0050] The distortion of the aspect ratio of the image in the mirror is compensated by adjusting the angle a between the large magnifying sheet 12 and the reflecting sheet 11. However, when the angle between the magnifying sheet 12 and the reflecting sheet 11 is larger, the height of the reflecting sheet 11 in the magnifying sheet 12 is lower, which is equivalent to wasting the field of view height. Therefore, the ratio of the height of the reflecting sheet 11 to the magnifying sheet 12 needs to be increased, generally controlled between 1:1.2 and 1:1.5.
Claims
1. An enlarged display device, comprising: a magnifying reflector assembly, comprising a reflector for receiving a projected image and reflecting the projected image, and a magnifying sheet for receiving and magnifying a reflected image of the reflector; and A load-bearing bracket, the magnifying reflector assembly is mounted on the load-bearing bracket, characterized in that: The reflective sheet is a hyperbolic convex mirror or the magnifying sheet is a hyperbolic concave mirror to construct a longitudinal defocusing so that the virtual image imaging distance of the reflected image in the longitudinal direction is farther than the virtual image imaging distance in the transverse direction, so that the image of the reflected image projected on the longitudinal imaging area of a line of sight of the eyeball is a defocused image, and the image of the reflected image projected on the transverse imaging area of a line of sight of the eyeball is a focused image.
2. The magnifying display device according to claim 1, wherein: Let the horizontal axis virtual image distance of the projected image after being reflected by the reflective sheet and the magnifying sheet be VIDh, the vertical axis virtual image distance of the projected image after being reflected by the reflective sheet and the magnifying sheet be VIDv, and the severity of the astigmatism between the longitudinal and lateral directions of the projected image be α, then 3. The magnifying display device according to claim 1, wherein: The included angle between the reflective sheet and the amplifying sheet is between 24 degrees and 32 degrees.
4. The magnifying display device according to claim 1, wherein: The height ratio of the amplifying sheet to the reflecting sheet is between 1:1.2 and 1:1.
5.
5. The magnified display device according to claim 1, wherein: The magnifying plate is a double-curvature concave mirror, a longitudinal axis curvature of the magnifying plate is greater than a transverse axis curvature, and the reflecting plate is a plane mirror or a convex mirror.
6. The magnifying display device according to claim 1, wherein: The reflecting plate is a double-curvature convex mirror, a longitudinal axis curvature of the reflecting plate is smaller than a transverse axis curvature, and the magnifying plate is a concave mirror.
7. The magnifying display device according to claim 1, wherein: The magnifying reflector set also includes a flip frame, one end of which is connected to the upper edge of the reflective sheet, and the other end of which is connected to the lower edge of the magnifying sheet.
8. The magnifying display device according to claim 1, wherein: The load-bearing bracket comprises an arm group and a fixing seat. One end of the arm group is connected to the magnifying reflector group, and the other end is connected to the fixing seat.
9. The magnifying display device according to claim 8, wherein: The arm assembly includes a first arm, a second arm, a first rotating shaft and a second rotating shaft. One end of the first arm is connected to the fixing seat, and the other end is connected to the first rotating shaft. One end of the second arm is connected to the second rotating shaft, and the other end is connected to the first rotating shaft.
10. The magnified display device according to claim 9, wherein: A third rotating shaft is also arranged between the supporting arm assembly and the fixing seat.